The current Error 160090 Description reads: "A persisted domain record with the specified name does not exist".
But what does that mean? I ask all kinds of people, including Esri Support, and no one really seems to know. ...And, besides, what does a domain have to do with an invalid join issue which is described here.
Cause: The Error is caused by adding a join to an existing join, where the Input Table was the Join Table in the existing join.
Solution: Use the same Input Table as the existing Input Table or start a new Add Join with a different Input Table.
I suggest the Error/Help page be re-written OR create anew Error code for this particular Invalid Join issue, perhaps with the wording similar to above.
Thanks!